EP0727016B1 - Procede permettant de verifier la fiabilite de fonctionnement d'un appareil hydraulique - Google Patents

Procede permettant de verifier la fiabilite de fonctionnement d'un appareil hydraulique Download PDF

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Publication number
EP0727016B1
EP0727016B1 EP94931553A EP94931553A EP0727016B1 EP 0727016 B1 EP0727016 B1 EP 0727016B1 EP 94931553 A EP94931553 A EP 94931553A EP 94931553 A EP94931553 A EP 94931553A EP 0727016 B1 EP0727016 B1 EP 0727016B1
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EP
European Patent Office
Prior art keywords
pressure
lines
pump
measured
valves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP94931553A
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German (de)
English (en)
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EP0727016A1 (fr
Inventor
Helmut Weis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co OHG
Original Assignee
ITT Automotive Europe GmbH
Alfred Teves GmbH
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6501703&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0727016(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ITT Automotive Europe GmbH, Alfred Teves GmbH filed Critical ITT Automotive Europe GmbH
Publication of EP0727016A1 publication Critical patent/EP0727016A1/fr
Application granted granted Critical
Publication of EP0727016B1 publication Critical patent/EP0727016B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/90—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using a simulated speed signal to test speed responsive control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

Definitions

  • the present invention relates to a method for Functional test of a hydraulic unit comprising several hydraulic functional units, in particular of an aggregate for converting mechanical into hydraulic energy, for example a pump for incompressible media, according to the preamble of the claim 1.
  • a method for Functional test of a hydraulic unit comprising several hydraulic functional units, in particular of an aggregate for converting mechanical into hydraulic energy, for example a pump for incompressible media, according to the preamble of the claim 1.
  • Such a method is known from document WO-A-90 02 066.
  • the object of the present invention is therefore a Method for functional testing of hydraulic units comprising several hydraulic functional units to propose, which makes it possible as far as possible deliver dry aggregates, especially pumps, i.e. the above To avoid disadvantages.
  • Another task is to be as inexpensive as possible Propose functional testing procedures, which at the same time enables possible Localize production defects.
  • these tasks are characterized by Part of claim 1 specified measure solved. So it is suggested one out of several hydraulic functional units completely assembled unit to check, and instead of the incompressible hydraulic medium, i.e. of the intended equipment of the unit, which is a pump, a motor or can also be a turbine etc. for the purpose of testing to use a compressible medium.
  • the incompressible hydraulic medium i.e. of the intended equipment of the unit, which is a pump, a motor or can also be a turbine etc.
  • air will be used, for example oil-free Compressed air, but also gases such as nitrogen and helium or steam is also conceivable.
  • the method for functional testing according to the invention hydraulic units is based on the idea that a Idle test of the unit is sufficient to ensure tightness and correct interaction of all functional units of the unit to be able to check. I.e. Functional units in the actual operation does not work, already fall during the functional test using the compressible medium on. The correctness of this idea has been shown in the Practice shown.
  • the unit to be tested to be initially charged with a certain initial pressure.
  • this serves to define a To produce the initial state, for example seals to press against their sealing seat, and on the other hand one carry out the first leak test.
  • the suitable one Initial pressure depends, for example, on the geometry of the Working rooms of the unit to be tested from and is adjust accordingly.
  • the proposed test method is particularly suitable for piston pumps that advance the piston or pistons have downstream check valves.
  • the function of the check valves and their tightness, as well as an exact piston stroke be determined. This can also be done through comparisons with experimentally determined values happen.
  • Is the compressible medium according to claim 9 a small Volume fraction of an incompressible medium added, for example the hydraulic fluid provided in Form of mist (droplets) or vapor, so one can Lubrication of the unit for the time of the functional test can be achieved. But it is also possible to choose one dispense with such lubrication when reassembling sufficient lubricant for the unit was introduced and the functional test only one short runtime of the unit required. A Non-destructive functional testing can also be carried out in this way and way be guaranteed.
  • the aggregate 1 shown in the figure consists of essentially from pump 2, pressure accumulators 3.4 and Chokes 5.6.
  • the pump 2 has two hydraulically separated ones Circles with a piston 7,8 each, which are connected by an eccentric be driven on. This is in the picture shown schematically.
  • Each of the pistons 7,8 limits a work space 10.11 and changed by its from Eccentric movement caused the volume of the work rooms 10.11.
  • Each opens into the working chambers 10, 11 Suction valve 12, 13 and a pressure valve 14, 15.
  • This Valves are designed as check valves with a certain Preload trained.
  • valves 12 to 15 their sealing and the seals between the piston 7,8 and the working space 10,11 is here waived.
  • the unit 1 On the input side with a Compressed air source 20 via the pneumatic lines 21 and 22 connected. Between the compressed air source 20 and the Lines 21, 22 each have a 2/2-way valve 23, 24, which is electromagnetically actuated and in unactuated The connection is blocked. Still are Pressure sensors 25,26 on the lines 21,22 that the applied pressure in an electrical voltage signal convert. Located at the outputs 18, 19 of the unit 1 pressure sensors 27, 28 on pneumatic lines 29, 30. The lines 29,30 are each in an unactuated State of closed 2/2-way valve 31, 32 with Pressure relief devices 33,34 connected. The pressure sensors 25,26,27,28 and the valves 23,24,31,32 are with one Control and evaluation unit 35 connected.
  • the unpressurized lines 21, 22 are connected to the inputs 16, 17 and the lines 29, 30 to the outputs 18, 19 of the unit 1.
  • the predetermined initial pressure p 0 is set in lines 21 and 22, respectively.
  • the valves 23 and 24 are opened by the control unit 35 depending on the signals from the pressure sensors 25 and 26, respectively.
  • the valves 23 and 24 are closed, and the pressure value p (t 1 ) measured at the time at the pressure sensors 27 and 28 is registered. If this value is within a predetermined error range, to p around the desired value (t 1), the first criterion is met. In any is too high bias the valves 12 to 15 p (t 1) to lower than p (t 1) in case of leakage to the outside is p (t 1) is much lower than p soll (t 1). If one of the pressure valves 18, 19 has a too low preload, P (t 1 ) is too high.
  • pump 2 After registering the measured values at time t 1 , pump 2 is started.
  • the pump is operated at a reduced output, which prevents resonance vibrations of the incompressible medium.
  • the ratio V p (t 1 ): p (t 2 ) can also be used. From this ratio, the correct filling of the working spaces 10, 11, ie the exact stroke of the pistons, can also be inferred.
  • the pump can be switched off, and pressure can be released from the unit 1 via the valves 31, 32.
  • the control and evaluation unit 35 now signals whether the unit 1 is functional or whether, and if so, which fault has been determined. This information can be used to search specifically for the error and, if necessary, to rectify the error.
  • Blowing device 36 can serve from a container 37 Small amount of hydraulic medium in the unit 1 blowing in compressed air at the start of the process, and to lubricate the unit 1 with it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Claims (10)

  1. Procédé permettant de contrôler le fonctionnement d'une machine hydraulique (1) pour fluides incompressibles, englobant plusieurs unités fonctionnelles hydrauliques (2 - 15), par exemple pompe, valve, étranglement, etc.,
       caractérisé en ce qu'on assemble les unités fonctionnelles hydrauliques (2 - 15) de façon à former une machine (1) complète et en ce que le contrôle de fonctionnement de la machine (1) complète est effectué au moyen d'un fluide compressible.
  2. Procédé suivant la revendication 1, caractérisé en ce qu'on met la machine (1) en marche et en ce que les pressions s'établissant en fonctionnement sur la ou les entrées d'agent de pression (16, 17) et/ou les sorties d'agent de pression (18, 19) sont mesurées.
  3. Procédé suivant la revendication 1 ou 2, caractérisé à ce que la machine (1) est mise en marche avec une puissance adaptée aux propriétés du fluide compressible.
  4. Procédé suivant la revendication 2 ou 3, caractérisé en ce qu'une pression initiale (p0) déterminée est appliquée à la ou aux entrées d'agent de pression (16, 17) et/ou à la ou aux sorties d'agent de pression (18, 19) avant que l'on mette la machine (1) en marche.
  5. Procédé suivant la revendication 2, 3 ou 4, caractérisé en ce que la variation dans le temps des pressions mesurées (p(t)) est enregistrée et analysée.
  6. Procédé suivant la revendication 5, caractérisé en ce que des valeurs de pression (p(t1), p(t2), ... ) mesurées a différents instants (t1, t2, ... ) servent à déterminer l'aptitude au fonctionnement ou le défaut provoquant une inaptitude au fonctionnement.
  7. Procédé suivant la revendication 6, caractérisé en ce que des valeurs de pression (p(t1), p(t2)) sont mesurées à deux instants (t1, t2) et en ce qu'à partir de la valeur de p(t1), de la différence (pd = p(t1) - p(t2)) et/ou du rapport (V = p(t1) : p(t2)) des valeurs de pression, il est conclu à une aptitude au fonctionnement ou à un défaut provoquant une inaptitude de la machine (1) au fonctionnement.
  8. Procédé suivant l'une des revendications précédentes, caractérisé en ce que la machine (1) à contrôler est une pompe à piston (2) qui comporte des valves antiretour (12 à 15) montées en amont et en aval du ou des pistons (7, 8).
  9. Procédé suivant l'une des revendications précédentes, caractérisé en ce qu'une faible proportion en poids d'un fluide incompressible est mélangée au fluide compressible.
  10. Installation, notamment pour la mise en oeuvre du procédé suivant l'une des revendications précédentes, caractérisée en ce qu'une source d'air comprimé (20) est raccordée au moyen de conduites pneumatiques (21, 22), tandis qu'entre la source d'air comprimé (20) et chacune des conduites (21, 22), il est disposé une valve (23, 24) respective qui, à l'état non commandé, bloque la liaison, et que, sur les conduites (21, 22), il est disposé des manomètres (25, 26) qui convertissent la pression qui est établie en un signal de tension électrique, en ce qu'il est prévu des raccords destinés à raccorder des entrées (16, 17) d'une machine (1) à contrôler aux conduites (21, 22), ainsi que des raccords destinés à raccorder des sorties (18, 19) de la machine (1) à des conduites pneumatiques (29, 30), en ce que des manomètres (27, 28) sont disposés sur les conduites pneumatiques (29, 30), les conduites (29, 30) étant raccordées à des détendeurs (33, 34) respectifs chacune par l'intermédiaire d'une valve (31, 32) fermée à l'état non commandé, et en ce que les manomètres (25, 26, 27, 28) et les valves (23, 24, 31, 32) sont reliées à une unité de commande et d'analyse (35), l'unité de commande et d'analyse (35) comportant un circuit électronique, qui commande les valves (23, 24, 31, 32) en fonction des signaux des manomètres (25, 26, 27, 28) et du temps, et des dispositifs d'affichage servant à afficher l'existence d'un défaut ou l'absence de défaut de la machine (1) à contrôler.
EP94931553A 1993-11-03 1994-10-26 Procede permettant de verifier la fiabilite de fonctionnement d'un appareil hydraulique Revoked EP0727016B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4337521A DE4337521A1 (de) 1993-11-03 1993-11-03 Verfahren zur Funktionsprüfung eines hydraulischen Aggregats
DE4337521 1993-11-03
PCT/EP1994/003523 WO1995012761A1 (fr) 1993-11-03 1994-10-26 Procede permettant de verifier la fiabilite de fonctionnement d'un appareil hydraulique

Publications (2)

Publication Number Publication Date
EP0727016A1 EP0727016A1 (fr) 1996-08-21
EP0727016B1 true EP0727016B1 (fr) 1998-10-07

Family

ID=6501703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94931553A Revoked EP0727016B1 (fr) 1993-11-03 1994-10-26 Procede permettant de verifier la fiabilite de fonctionnement d'un appareil hydraulique

Country Status (5)

Country Link
US (1) US5694808A (fr)
EP (1) EP0727016B1 (fr)
JP (1) JPH10505892A (fr)
DE (2) DE4337521A1 (fr)
WO (1) WO1995012761A1 (fr)

Families Citing this family (14)

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Publication number Priority date Publication date Assignee Title
US5705511A (en) * 1994-10-14 1998-01-06 Cephalon, Inc. Fused pyrrolocarbazoles
US6240792B1 (en) 1999-05-24 2001-06-05 David R. Elsesser Support and testing apparatus for snow plow assembly
JP3723866B2 (ja) * 2001-02-07 2005-12-07 株式会社日立製作所 インターナルポンプの性能監視方法及び装置
WO2002086437A1 (fr) * 2001-03-02 2002-10-31 Waters Investments Limited Procedes et appareil servant a determiner la presence ou l'absence d'une fuite de fluides
DE10143672A1 (de) * 2001-09-06 2003-03-27 Continental Teves Ag & Co Ohg Verfahren zur Funktionsprüfung von Hydraulikpumpen
JP4589705B2 (ja) * 2004-11-29 2010-12-01 株式会社ショーワ 油圧装置の洩れ検査方法及び装置
KR100703977B1 (ko) * 2005-08-02 2007-04-06 삼성전자주식회사 밸브 테스트 장치와 솔레노이드 밸브 테스트 방법 및벤추리 밸브 테스트 방법
CN101370695B (zh) * 2006-01-20 2012-06-20 大陆-特韦斯贸易合伙股份公司及两合公司 真空制动力放大器及其运行方法
DE102008060253A1 (de) * 2008-11-12 2010-07-29 Thyssenkrupp Egm Gmbh Verfahren zur Prüfung von hydraulikbetätigbaren Bauteilen
DE102011012322A1 (de) * 2011-02-25 2012-08-30 Thomas Magnete Gmbh Druckregelnde Hubkolbenpumpe
US9128008B2 (en) * 2012-04-20 2015-09-08 Kent Tabor Actuator predictive system
US20150059327A1 (en) * 2013-04-17 2015-03-05 Arthur M. Rabert Dual channel pulsed variable pressure hydraulic test apparatus
US10920805B2 (en) 2017-10-31 2021-02-16 Deere & Company System and method for detecting a connector failure in an agricultural apparatus
US10656038B2 (en) * 2018-07-30 2020-05-19 Honda Motor Co., Ltd. Apparatus, system, and method for use in fluid filling apparatus inspection

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US3452591A (en) * 1967-05-11 1969-07-01 United Ind Syndicate Apparatus for testing fuel pumps
US3577776A (en) * 1969-05-22 1971-05-04 Cummins Engine Co Inc Fuel pump testing method and apparatus
US3817097A (en) * 1972-06-05 1974-06-18 T Heroux Method and apparatus for testing hydraulic pumps
US4598579A (en) * 1984-10-23 1986-07-08 Cordis Corporation Portable instrument to test pressure/flow of ventricular shunt valves
JPS6490861A (en) * 1987-09-30 1989-04-07 Sumitomo Electric Industries Tester for liquid pressure circuit of anti-lock control system
JPH01284382A (ja) * 1988-05-11 1989-11-15 Nkk Corp 飛灰処理方法
DE58909036D1 (de) * 1988-08-26 1995-03-30 Teves Gmbh Alfred Hydraulische bremsanlagen mit blockierschutz- oder antriebsschupfregelung.
US5000664A (en) * 1989-06-07 1991-03-19 Abbott Laboratories Apparatus and method to test for valve leakage in a pump assembly
US5113705A (en) * 1990-12-21 1992-05-19 Siemens Automotive L.P. Functional testing of solenoid valves in air
US5499530A (en) * 1994-10-03 1996-03-19 Chrysler Corporation Pneumatic tester for engine oil pumps

Also Published As

Publication number Publication date
DE4337521A1 (de) 1995-05-04
DE59407062D1 (de) 1998-11-12
JPH10505892A (ja) 1998-06-09
US5694808A (en) 1997-12-09
EP0727016A1 (fr) 1996-08-21
WO1995012761A1 (fr) 1995-05-11

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